bisecting fixing commit since d7e78d08fa77acdea351c8f628f49ca9a0e1029a building syzkaller on 816e0689d7d9d8321f8bf360740f0e516aee15ca testing commit d7e78d08fa77acdea351c8f628f49ca9a0e1029a compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 8a53774e72b6b4254d825106a221850391bbcd14c4de49a9a5c398c35217699f run #0: crashed: KASAN: use-after-free Read in __queue_work run #1: crashed: WARNING: ODEBUG bug in bt_host_release run #2: crashed: general protection fault in __queue_work run #3: crashed: KASAN: use-after-free Read in __queue_work run #4: crashed: general protection fault in __queue_work run #5: crashed: KASAN: use-after-free Read in __queue_work run #6: crashed: WARNING: ODEBUG bug in bt_host_release run #7: crashed: WARNING: ODEBUG bug in bt_host_release run #8: crashed: WARNING: ODEBUG bug in bt_host_release run #9: crashed: WARNING: ODEBUG bug in bt_host_release run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK testing current HEAD 4ba8e26127c393c32776dff6d79c5b82de6dc542 testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 1ab54313e8eba023ff611f50e784b6175c70ed65ca3d34af3ddc3f0c5aeb3178 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 34m3.267738565s (build: 18m35.723202974s, test: 14m50.959102722s) the crash still happens on HEAD commit msg: Linux 4.14.262 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout